Mortising-machine.



H. S. HALLWOOD.

MORTISING MACHINE.

APPLICATION FILED FEB. 1. 191a.

Patented May a, 1917.

2 SHEETSSHEET 1.

H. S. HALLWOOD.

MORTISING MACHlNE.

APPLICATION FILED FEB-1,1916.

1,225,6Q5 Patent/ed May 8, 1917.

2 SHEETS-SHEET 2.

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HENRY S. HALLWOOD, OF COLUMBUS, OHIO.

MOBTISING-MACHINE.

Specification of Letters Patent.

Patented May 8, 1917.

Application filed February 1, 1916. Serial No. 75,543.

To all whom it may concern: v

Be it known that I, I'IENRY S. HALLwooD, a citizen of the United States of America, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Mortising-Machines, of which the following is a specification. 1

This invention relates to improvements in mortising machines of the hand power type, and the invention is designed to provide a portable device of this character which is particularly adapted for use by the ordinary mechanic in mortising slots for tenons and door locks, or recesses for hinges, and the like, at a minimum expenditure of time and labor.

Most of the machines now in use, with which I am familiar, are provided with a positive feed mechanism, which, from its very nature, precludes its adaptation with equal effectiveness to soft hard, or knotty wood, and, in addition, the very small screw feed requires that a great number of cuts be made in securing the proper depth. Inthis improvement the feeding device is of such flexibility as to adapt it for cutting a mortise in any kind of wood with less time and labor, as will be hereinafter more clearly pointed out.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my invention, constructed according to the best mode I have so far devised for the practical application of the principles of my invention.

Figure l is an end view.

Fig. 2 is a side elevation.

Fig. 3 is a top plan view.

Fig. 4: is a transverse sectional view of the supporting frame, showing a portion of the slidable carriage.

Fig. 5 is a longitudinal sectional view of a portion of the supporting frame and carriage, illustrating the bit in dotted lines.

Fig. 6 is a vertical sectional view of the slotted or grooved stem for holding the bit.

Fig. 7 is a view in elevation of the bit.

Fig. 8 is a transverse sectional view of the bit.

Fig. 9 is a diagrammatic view illustrating the machine supported at the edge of an upright door in order to drill horizontally into the wood.

Fig. 10 illustrates the position of the ma chine when drilling vertically into the wood.

Fig. 11 illustrates one manner of drilling the holes before the parts are reamed or chiseled out.

In tlie preferred embodiment of my invention, as illustrated in the drawings, I em ploy the rectangular bed or frame 1 having an open center and formed with an integral perforated ear 2 at each corner and beneath or at the underside of'the bed. There are four of these perforated ears to receive the four clamp screws 3 by means of which the bed may be clamped over the edge of a door, as indicated in Figs. 9 and 10.

The screw clamps are arranged in pairs on each side of the door, and provide means for rigidly and securely holding the bed to the door.

At its ends the bed is provided with a pair of upwardly projecting lugs 4t, 4 carrying cylindrical bars 5 5 on which the carriage 6, rectangular at its base and having its corner sleeves 1O engaging the bars 5, is slidable by means of the threaded rod 7 engaging the lug 8 on the bed and swiveled to the carriage at 9. The top center of the carriage is fashioned with a bearing sleeve or head 11 for the spindle 12 which is formed with a groove 13 in its surface, and the working head of the spindle is provided with a socket 14: and tapered bearing 14: to receive the threaded end 15 and shoulder 15 of the bit 16 which is thus rigidly and securely held. The bit is provided with the usual cutting flanges at its lower end for drilling holes in the line of its axis, and for the purpose of removing fins between these bored holes and forming a mortise or slot from the holes, the bit is also provided with teeth projecting at an angle from the axis of the bit or drill and located on the periphery of the drill. By the presence of the latter cutting devices, the carriage and drill maybe reciprocated together to ream out the fins between the bored holes.

The spindle 12 is adapted to revolve and move both vertically and horizontally, and it is revolved through the medium of the handle 17, gear 18, pinion 19, shaft 20, pinion 21, gear 22 on its shaft and the bevel pinions 23 and 23 supported in the carriage 6. The bevel gear 23, it will be noted, is supported on the grooved spindle 12, between a pair of lugs 24, 24 integral with the supporting bracket 25, and by this construction the spindle is revolved, and at the same time permitted to pass through the bevel gear 23 which is splined to the grooved spindle for this purpose.

The feed of the bit is accomplished is formed on the link which may be grasped by the operator to feed-the bit While, with the other hand, the operator turns the crank handle 17 to revolvethe bit, and the train of gears is so arranged as-to drive the=bit at a high speed. A gage collar 3O maybe adjusted to any desired position on the spindle :and retained there by setv screw 31, to gage or limit the depth of the hole bored bythe bit, and byimeans of the recess or notches32-in the link, and thepivoted pawl 38 onthe headll, the spindle may be held against progressive feed. If desired, a spring as 34* may be attached between a part of the carriage and the handle of the link in orderto secure a continuousfeed for certain kinds of-work. When'thebit is to be fed by hand, ofcourse the pawl'33 is freed fromthe link. and turned tothe right or left as indicated in dotted lines Fig.1.

By meansof agpivoted'pawl 34-011'tl16 carriage and a series ofspaced perforations 35 on the side bar, or'bars, of the bed, the carriage may be moved longitudinally on the bars 5, 5 and held in-adjustediposition. In-such' case, the screw bar 7 is dispensed with and the carriage is moved by the hand grasping the handle 36 which projectsafroin the side of the carriage, as indicated in=the modified forms of the invention, Figs. 4 and 5. For reaming or slotting, the pawl is held up out of-operative position,-- and then the frame is free to slide when pressure is applied-either fromthe screw -7 or handle 36'.

A pair of oppositely disposed hinged braces 37, '37 located below the base ofthe carriageand suspended therefrom are-designed to support aguide block 38 through which the upper end of the bit projects-and by means of the two set screws or'bolts39 carried by the hinged braces the bit may be held'rigidly against lateral motion during the operation of reaming. xInvertical-boring the braces would be of no advantage to the bit, but when the carriage and bit are pushed horizontally (the carriage sliding on its bed) while :thebit is in the wood and cutting, the braces :strengthen the shank of'the bit near thesurfacesiof the wood to take the strain ofl the'shank. When notin use, these braces maybe turned up on their hinged supports as indicated in dotted lines at the right in Fig. 5.

The operation of the machine will be apparent from the preceding description and "the drawings. The bit, after being secured in the spindle, is revolved through the ma- 'nip'ulation*of the handle 17 and itstrainof .gears,"and:the carriage may be set to various positions for drilling successive holes through the medium of thescrew bar =7, or, if-the screw bar is not present, then by means of the'handle 36 and the pivoted" pawl or dog 34, as described, and the feed is accomplished'bypulling down onthe handle 29 of the'feed link 26, the-spring pawl 3-3 of course being disengaged from the link.

In Figs. L and 5 the carriage is moved by the hand grasping the handle 36, the two fingeredpawl 34L being adapted zfor:retaining the carriagein set position'ifmoved to theright or left, asin Fig. 5. Withithe pawl 34. in; position, shown in'Fig. 5, the bit is adaptedito' drill,-successively, holes A. C. E, Fig.. 11, while, if the pawl is swung over to the "right in Fig. 5 "and: the other finger made to engage the openings 85, the drill will be: in position .to; bore 1 the holes B and D. This manner of cutting is; provided .for, in connection with the equidistant holesv 35 of the series, bythe fact that the-fingers 34 and 84 of the pawl-are at relatively different'distances from the;pivot point. This form of. the machine is: particularly adapted for work when themachine-is located as in Fig. 10 and-the-door is standing onnedge andunhung.

'InFig. 9 the machineis-applied tothe door while it .is suspended I on its hinges, when the screw feed is essential. The size and weight ofthe:machine:permits of its being carried about-from place to place, and by'means of'theclamps or clampscrews 3, the: machine may be appliedto the. edge of a door, eitherbefore or after. it is hung.

While the machine illustrated is adapted for manual power it-will, of-course, be understood that mechanical oraelectrical power may be used to operate the drilling machine, and 'of' course the :machine is adapted for use in other ways-.than merely for cutting mortises for door looks. A wide variety of cutting to'olsor :bits may be used in the machine, such as reamers, hollow augers, taper augers, expansion or-.combination bits and the-like, but itis theipurpose of the'inventor to use the one tool shown for theipurpose of both drilling the holes -A,:B, C, DgE, andthenfor reaming or cutting away "the fins left between the adjoining bores to complete :and finish the mortise, withoutthe necessity of changing augers.

"What'I-claim is 1. The combination in a drilling'machine witha supporting carriage and a revoluble, reciprocable drill holding spindle, of hinged braces connected to the carriage having adjustable means for holding the drill in rigid position.

2. The combination With a supporting carriage and a revoluble, reciprocable drill holding spindle, of a pair of braces hinged to the carriage, and oppositely disposed set screws in the braces for retaining the drill in inflexible operative position.

3. The combination with a fixed bed having a lineal series of equidistant holes there in, of a reciprocable carriage supported on the bed, a pawl pivoted on the carriage and provided with fingers of different radii adapted to engage said holes, a drilling tool supported in the carriage, and operating means therefor.

In testimony whereof I afiix my ture.

signa- HENRY S. HALLWOOD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

